package cn.com.my.yes1;

import java.util.Arrays;
import java.util.Collections;
import java.util.List;

public class RandomTest {
	public static void main(String[] args) {
		String[] beforeShuffle = new String[] { "2", "3", "4", "5", "6", "7", "8", "9", "1", "0" }; 
	     List list = Arrays.asList(beforeShuffle); 
	
	     Collections.shuffle(list); 
	     StringBuilder sb = new StringBuilder(); 
	     for (int i = 0; i < list.size(); i++) { 
	         sb.append(list.get(i)); 
	     } 
	
	     String afterShuffle = sb.toString(); 
	     String result = afterShuffle.substring(5, 9); 
	    System.out .print(result);
	}	
	 
}
